fixing compile errors with some compilers

[SVN r55744]

test/Jamfile.v2

@@ -38,6 +38,7 @@ run no_exceptions_test.cpp : : : <exception-handling>off ;
 run errinfos_test.cpp ;
 compile-fail exception_fail.cpp ;
 compile-fail throw_exception_fail.cpp ;
+compile-fail error_info_const_fail.cpp ;
 
 #headers
 

test/error_info_const_fail.cpp

@@ -0,0 +1,14 @@
+//Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc.
+
+//Distributed under the Boost Software License, Version 1.0. (See accompanying
+//file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/exception/get_error_info.hpp>
+
+typedef boost::error_info<struct foo_,int> foo;
+
+void
+test( boost::exception const * e )
+    {
+    ++*boost::get_error_info<foo>(*e);
+    }